High voltage ride-through method for wind power based on coordinated control of energy storage and reactive compensation devices

Abstract

The present invention provides a high voltage ride-through method for wind power based on coordinated control of energy storage and reactive compensation devices, comprising fault determination based on voltages of grid connection points of wind farms; setting voltage fluctuation thresholds of grid connection points under faults, and determining whether to implement super capacitor, doubly-fed induction generator, and static var generator coordinated control strategies based on voltage fluctuation thresholds of grid connection points of commutation bus voltages under faults; calculating reactive power shortage of grid connection points under faults based on the control strategies; and determining whether the reactive power shortage of grid connection points is within wind farm regulation ranges and implement corresponding control strategies to adjust voltages based on the reactive power shortage; and determining whether to utilize static var generators to compensate reactive power based on reactive power compensation of doubly-fed induction generators according to deviations between adjusted voltages and steady-state values. The high voltage ride-through method for wind power based on coordinated control of energy storage and reactive compensation devices provided by the present invention can improve the high voltage ride-through capability of wind farms.

Dependencies are inferred from the claim text.